/*
 * Copyright 2002-2005 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.aop.aspectj;

/**
 * Simple implementation of AspectInstanceFactory backed
 * by a singleton.
 *
 * @author Rod Johnson
 * @since 2.0
 */
public class SingletonAspectInstanceFactory implements AspectInstanceFactory {
	
	private final Object aspectInstance;


	public SingletonAspectInstanceFactory(Object aspectInstance) {
		if (aspectInstance == null) {
			throw new IllegalStateException("AspectInstance may not be null");
		}
		this.aspectInstance = aspectInstance;
	}


	public final Object getAspectInstance() {
		return aspectInstance;
	}

	public final int getInstantiationCount() {
		return 1;
	}
	
}
